Just a correction. There will be no last block. At least it won't be likely to happen in the next century. You mean the last non-zero reward.

Yes I do agree that Satoshi hadn't thought of this massive use by people.

He satoshi never created the said bitcoin to be a currency rather to be a method of payment digitally. This has been spotted out recently when the issue of "purpose of Bitcoin came into play". The world or the community of Bitcoin has turned through speculation to make the bitcoin a currency instead of it to be payment method as it was created. Bitcoin is an investment platform and a payment method and not as a currency as many have been speculated.

Satoshi couldn't think of all aspects of Bitcoin's future and he had no intention to create Bitcoin for replacing all form of money. Bitcoin scarcity makes it worthy, so miners are interested in it and won't leave one day. No one can't guess what happens in a century. It's too early to draw any conclusions about the future of system after the last block will be mined.

Exactly this. It was predicted and protections are in place since begining.
Difficulty will adjust to mining power and mining power will adjust to profitability.
So its closed circle, no loop-holes there to take advantage of.

Bitcoin has become an investment at first when it first created. then after the pizza thing happened, it became coins that will lead to the means of payment whoever wants to implement it in their stores. take a look at what happened, you can see that bitcoin became one of the top currency of the world and used by many big companies as a means of payment and they don't really care if the price will change like roller coaster they still accepting it till now. the good thing is, there are many of them who adopt this method as we are posting some replies to this thread.

Is there any coin in the world that people don't invest in? I think big investment in fiat currencies also contribute to their value, so why not Bitcoin also?

I think he did what was feasible in his days. He probably imitated scarce resource like gold to add to the growth of Bitcoin price/value via deflation.
I guess light PoW that spreads rewards amongst many unique participants on multi-purpose devices like laptops within a robust Bitcoin ecosystem would have been better.  There should be reasonable or good amount of control that a decentralized Bitcoin/crypto community should have over its economy to keep it moving as intended. The control shouldn't come from outside the decentralized system especially via centralized systems.

I recommend that you read more and post less. Your beliefs have already been addressed here and have been shown to be wrong or at best unsupported.

Nothing is perfect thats the best way to say here,and besides even that there is something Satoshi did not anticipate means we are failure because look how Bitcoin is doing now?

is there anything that we can hate about this crypto if we already knew how this works and what this can help us?
the problem here is people keep on looking about the mistakes and what have not done but don't even bother to say thanks about the accomplishments .

You may be right about what you have said, but I am not going to blame him for that. I guess there are things he never knew then and if he's still around now he would wish that he did know about them. But I don't think that it's late, there's still time for everything to get better.

The devs that are in charge now can still take over and complete the job by correcting the things they think is not right. And moreover, I think he was very much aware that Bitcoin is going to be volatile, so he was sure that people are going to see Bitcoin more as an investment, since there is really nothing backing it up except the trust we have in it.